Description: 【Versatile Hydration and Phone Storage】: This lightweight sports backpack features a dedicated compartment for a water bottle and storage pocket, ensuring stay hydrated and connected during your outdoor activities 【with Reflective Strips】: Designed with reflective strips on both the front and back, this backpack enhances visibility during night runs or cycling, providing an extra layer of safe in low light conditions 【Secure Double Buckle Design】: The double buckle system ensures the backpack stays securely in place, offering stability and comfort whether you're running, hiking, or cycling 【Spacious Back Compartment】: Equipped with a large back pocket, this vest bag provides ample space for carrying additional essentials like snacks, maps, or small gear items needed for your adventure 【Material】: Made from Oxford Cloth material that is wear resistant and built to withstand rigorous outdoor use. Size 27cmx2cmx36cm/10.63inchx0.79inchx14.17inch Specification: Material: Oxford Cloth Size Chart: 27cmx2cmx36cm/10.63inchx0.79inchx14.17inch Package Includes: 1 Hydration Vest Pack Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.